Case-insensitive dict, non-destructive, fast, anyone?

[Terry Reedy]

"Raymond Hettinger" <vze4rx4y at verizon.net> wrote in message 
news:rul3e.4647$db.487 at trndny07...
> More important than the percentage is the clarity of the resulting code 
> and the
> avoidance of continous reinvention of workarounds.
>
> Separating tool features into a basic and an advanced version is common 
> solution
> to managing option/customization complexity.

A super bells & whistles dict would certainly pre-answer a lot of queries 
and save much newsgroup/list response time.

tjr